Defensive publication



r z. 0 0 i a DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 0.G. 1221. Identiflcation is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for '30 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED MARCH 25, 1969 S60 O.G. 1007 764,023 SYNTHESIS OF ACRYLONITRILE FROM PROPYLENE, AMMONIA AND OXYGEN Edgar L. McDaniel and Howard S. Young, both Tennessee Eastman Company, P.O. Box 511, Kingsport, Tenn. 37662 Continuation of application Ser. No. 523,267, Jan. 27, Y 1966. This application Sept. 19, 1968. Published Mar. 25, 1969 I Class 252437 As P V W O XI-I O wherein:

c=2-12, and

d=0-10, and

wherein the sum of c and a does not exceed 12, and e= /2 (a.m+b.n+c.p+d.q)

and wherein:

m": average valence of As in catalyst w: average valence of P in catalyst p=average valence of V in catalyst q=average valence of W in catalyst, and X=0-10.

Preferred catalyst compositions have the following characteristics:

a=0.510 and with c, d, e and x remaining as above.

The catalyst can be supported on suitable carriers, such as silica gel, kicselguhr, silicon carbide, etc.

Acrylonitrile is prepared by reacting propylene ammonia and oxygen at temperatures of 350600 C., the preferred range being 425575 C. While reactant ratios near stoichiometric values are preferred, the ratios can 'vary from propyleneroxygen ratios of 1:0.2-5 and propylenezamnionia ratios of 1:0.2-3. 

